Using Joomla! Article ID in a J2C layout

Hello, I would like to insert the Joomla! Article ID into a product page.

Using the standard 

Factory::getApplication()->input->get('id');

does not work as it shows the J2C Product ID instead.

If I cannot do that, how can the shop owner search for the J2C Product ID in the admin area?

Thanks

S :)

And as usual, I find the answer 2 mins after asking for help!

Just use 

$this->product->product_source_id;